Grainger LAST VERIFIED: August 5, 2026

W.W. Grainger is one of the most established names in industrial distribution, with over 90 years in business and a catalog of more than 1.5 million products. Described as America’s largest MRO distributor, it covers maintenance, repair and operations staples: safety and security, tools and test instruments, cleaning and janitorial, HVAC, electrical and lighting, material handling, plumbing and fasteners. The operation pairs its e-commerce catalog with a physical branch network, a mobile ordering app and 24/7 customer and technical support reachable at 1-800-GRAINGER, giving it a scale and service footprint that few competitors in the category can match.

Commercial terms are unusually friction-free for a distributor of this size. There is no minimum order quantity implied; Grainger sells single items across its 1.5 million-plus product range, and no account is required to buy. Our data does not include published shipping rates or a list of accepted payment methods, so buyers should confirm freight costs at checkout. For larger operations, Grainger layers on programs beyond simple ordering: KeepStock vendor-managed inventory, a bulk order pad for fast repeat purchasing, and energy, EH&S and facility-management programs, plus the branch network for local pickup and support.

Grainger fits almost any business that consumes MRO, safety or facility supplies, from a single-site shop buying one replacement part to enterprises that want vendor-managed inventory through KeepStock. The single-unit purchasing model and lack of account requirements make it as accessible as a retail site while retaining industrial depth. It is not a source for resale-oriented buyers hunting below-wholesale pricing; it is a supply channel for end users, and margin-focused resellers should look elsewhere. No red flags appeared in our review. The main caveats are the unpublished shipping and payment details in our data, which are worth checking before a first large order.